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y = x +49
20x + 50(x + 49) = 3500
20x + 50 x + 2450 = 3500
70x= 1050
x= 15
y= 15 +49 = 64
spr.
20 * 15 + 50 * 64 = 300 + 3200 = 3500
Odp: Banknotów 20zł było 15, a 50 zł było 64.
y- ilosc bankn. 20zl
50x+20y=3500
x-49=y
-------------------
5x+2y=350
5x+2(x-49)=350
7x-98=350
7x=448
x=448/7=64
y=64-49=15
ODP
ilosc bankn. 50zl bylo 64
ilosc bankn. 20zl bylo 15
pozdrawiam
Hans
y- banknoty 20zł
50x+20y=3500
x=y+49
50(y+49)+20y=3500
50y+2450+20y=3500
70y=1050
y=15
x=y+49
x=15+49
x=64